An FEC scheme combined with weighted scheduling to reduce multicast packet loss in IPTV over PON

Zare, Sajjad; Rahbar, Akbar Ghaffarpour

doi:10.1016/j.jnca.2011.09.008

Cited by 11 publications

(4 citation statements)

References 20 publications

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“…Benefitting from the reduced memory price, the buffers used in OLT/ONUs have been significantly increased, thereby buffer overflow in PON sharply decreased. Moreover, Sajjad Zare et al gave an effective downstream link scheduling to reduce packet loss for video over PON [19]. This scheme can reduce packet loss rate by almost 55% and 10% respectively under traffic load 0.9.…”

Section: Related Workmentioning

confidence: 99%

An Unequal Protection FEC Scheme for Video over Optical Access Networks

Cao¹,

Chen²,

Wang³

et al. 2013

KSII TIIS

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In this paper, we propose an unequal protection physical coding sub-layer (PCS) forward error correction (FEC) scheme for efficient and high-quality transmission of video data over optical access networks. Through identifying and resolving the unequal importance of different video frames and passing this importance information from MAC-layer to PCS, FEC scheme of PCS can be adaptive to application-layer data. Meanwhile, we jointly consider the different channel situations of optical network unit (ONU) and improve the efficiency of FEC redundancy by channel adaptation. We develop a theoretical algorithm and a hardware method to achieve efficient FEC assignment for the proposed unequal protection scheme. The theoretical FEC assignment algorithm is to obtain the optimal FEC redundancy allocation vector that results in the optimum performance index, namely frame error rate, based on the identified differential importance and channel situations. The hardware method aims at providing a realistic technical path with negligible hardware cost increment compared with the traditional FEC scheme. From the simulation results, the proposed Channel and Application-layer data Adaptation Unequal Protection (CAAUP) FEC scheme along with the FEC ratio assignment algorithm and the hardware method illustrates the ability of efficient and high-quality transmission of video data against the random errors in the channel of optical access networks.

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Section: Related Workmentioning

confidence: 99%

An Unequal Protection FEC Scheme for Video over Optical Access Networks

Cao¹,

Chen²,

Wang³

et al. 2013

KSII TIIS

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show abstract

“…The approaches to solve the packet loss problem mainly fall into two categories: ARQ (Automatic Repeat Request) and FEC (Forward Error Correction) [1] [2] [3]. ARQ is simple but will cause congestion in the network when the request number is too great and the time delay is uncertain.…”

Section: Introductionmentioning

confidence: 99%

OPRSFEC: A middleware of packet loss recovery in live multicast smart tv systems

Jiang

Chen

2013

2013 IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS)

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In Smart TV Live Multicast systems, packet loss is one critical factor that causes OoS(Quality of Service) decreases, OPRSFEC (Optimized Reed-Solomon Forward Error Correction) provides an end-to-end method of packet loss recovery in the application layer which can recover lost packets completely (when the loss rate is less than 5%) with few computational resources and very little impact on users' real-time experience. The OPRSFEC middleware has become a production-level technology which forms part of the IPTV2.0 standard in Shanghai Telecom and has been running on Mstar boards in Moca model television sets of brand Haier.

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“…But FEC increases the bandwidth load because of redundant codes. Reference [11] adjusts the schedule to alleviate the congestion and decreases packet loss, but it does not take other possible reasons for packet loss into account. Reference [12], [13] combines ARQ and FEC to decrease the bandwidth cost and sacrifices some FEC effect and some real-time performance.…”

Section: Introductionmentioning

confidence: 99%

Improving Recovery Rate for Packet Loss in Large-Scale Telecom Smart TV Systems

Jiang

Chen

et al. 2013

IEICE Trans. Inf. & Syst.

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SUMMARYSmart TVs are expected to play a leading role in the future networked intelligent screen market. Currently, many operators are planning to deploy it in large scale in a few years. Therefore, it is necessary for smart TVs to provide high quality services for users. Packet loss is one critical reason that decreases the QoS in smart TVs. Even a very small amount of packet loss (1-2%) can decrease the QoS and affect users' experience seriously. This paper applies stochastic differential equations to analyzing the queue in the buffer of access points in smart TV multicast systems, demonstrates the reason for packet loss, and then proposes an end-to-end error recovery scheme (short as OPRSFEC) whose core algorithm is based on Reed-Solomon theory, and optimizes four aspects in finite fields: 1) Using Cauchy matrix instead of Vandermonde matrix to code and decode; 2) generating inverse matrix by table look-up; 3) changing the matrix multiplication into the table look-up; 4) originally dividing the matrix multiplication. This paper implements the scheme on the application layer, which screens the heterogeneity of terminals and servers, corrects 100% packet loss (loss rate is 1%-2%) in multicast systems, and brings very little effect on real-time users experience. Simulations demonstrate that the proposed scheme has good performances, successfully runs on Sigma and Mstar Moca TV terminals, and increases the QoS of smart TVs. Recently, OPRSFEC middleware has become a part of IPTV2.0 standard in Shanghai Telecom and has been running on the Mstar boards of Haier Moca TVs properly.

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An FEC scheme combined with weighted scheduling to reduce multicast packet loss in IPTV over PON

Cited by 11 publications

References 20 publications

An Unequal Protection FEC Scheme for Video over Optical Access Networks

An Unequal Protection FEC Scheme for Video over Optical Access Networks

OPRSFEC: A middleware of packet loss recovery in live multicast smart tv systems

Improving Recovery Rate for Packet Loss in Large-Scale Telecom Smart TV Systems

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